Wrench



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H. W. JACOBSON WRENCH Filed Dec. 1, 1926 Aug. 14, lsza Patented Aug. 14, 1928.

UNITED STATES Lsogisa PATENT OFFICE.

HERMAN W. JACOBSON, 0F FONDA, IOWA, ASSIGNOB 0F ONE-THIRD TO FRANCIS M TICE, 0F FONDA, IOWA.

WRENCH.

Application led December 1, 1926. Serial No. 151,982.

This invention relates to an improved wrench which is especially, but not necessarily, adapted for use by automobile mechanics and persons requiring an especially designed Wrench for removing and inserting nuts and bolts in comparatively inaccessible places.

Briefly, the present invention is directed to a wrench including a peculiarly shaped and offset hand-gri a swivelly mounted hand-grip, an especialily constructed end portion on the shank for accommodating interchangeable sockets, together with a novel spring-pressed plunger associated with the shank and socket.

The primary feature of construction is in the provision of a plunger which extends into the sockets for the purpose of removing nuts and bolts when they become wedged in the sockets, and for properly positioning a nut or a bolt with respect to the sockets to facilitate application and removal.

The present feature of construction is in the particular formation of the swivelly mounted or rotatably mounted hand-grip which is of tubular and hollow form and is provided with a removable cap providing a container for washers and similar elements employed as fillers to be used in association with the end of the plunger extending into the socket.

Other features and advantages of the invention will become apparent from the followin description and drawing.

In t e accompanying drawings forming a part of this application and in which like numerals are employed to designate like parts throughout the same:

Figure 1 is a side view of a wrench constructed in accordance with the invention with the socket removed.

Fig. 2 is an enlarged detail elevational and sectional view showin the sockets in section and the manner in w ich the plunger is used in one instance.

Fig. 3 is a detail view showing the hollow hand-grip construction,

Fig. 4 is a perspective view showing the association of the plunger with the outer end of the shank.

Referring now to the drawings in detail it will be seen that the reference character 1 designates the crank portion of the brace on one end of which is the tubular hand-grip 2. As shown in Fig. 3 one end portion of the crank is provided with a lgroove 3 and a set screw 4 is carried by the hand-grip and extends into this groove thus providing a swlvel connection. It will also be noted from this figure that the hand-grip is longer than the part to which it is attached and the extending portion provides a compartment or chamber 5 for reception of the various washers 6, small horse-shoe 7 and elongated block 8, etcetera. These are held in place by removable screw-threaded plugs 9 which preferably has a knurled surface to facilitate application and removal.

Extending at right angles from the pecullarly shaped end portion of the brace is a rather long shank 10 having a square end portion 11 provided with a slot spring retaining latch 12. At the juncture of the shank with the brake is an abutment or shoulder 13 and this together with the shank is formed with a longitudinal bore through which the stem 14 of a plunger extends. This stem is provided on its lower end with a finger knob 15 and is surrounded by coil springs 16 which serve to normally retract the plunger. The opposite end of the stem is screw threaded for attachment of one of the accessories as shown in Fig. 3. A removable socket 17 is fitted onto the square end portion of the shank and is held in place by the spring latch. Obviously, the washer equipped end of the plunger extends through this socket for removing nuts, bolts, and the like which have become lodged therein due to accumulation of grease and oil.

Attention is directed to the fact that the plunger is of a greater length than the combined length of the socket and shank. Thus the spring pressed end extends normally beyond and in spaced relation to the abutment 13 to allow the opposite end to be pushed through and beyond the socket. When the device is used as an ejector for removing large nuts, one of the washers 6 is placed upon the screw-threaded end of the stem and the plunger is reciprocated in an obvious manner to eject the nut from the socket. If it is desired to aid in the placement of a small bolt such as is represented for instance in Fig. 2, it is obvious that the washer is placed thereon and the horse-shoe collar 7 is employed as a filler maintaln the spring compressed and to dispose the small bolts shown in dotted lines 1n elevated position. Frequently the depth of the sockets is such as to allow the bolt to drop too far into the socket to permit it to be conveniently threaded into a hole. This is also true in some instances where it is desired to thread a nut onto a bolt. Frequently the nut will be of a thickness less than the depth of the socket and will drop down into the bottom of the socket, making it diiiicult to start the nut. However, by pushing the nut out flush with or slightly beyond the end of the socket and placing the collar fillers in place, the spring of the plunger can be held compressed and the nut held in a convenient position to facilitate starting. It is understood also that the device is advantageous because of the fact that the removable sockets and point of connection with the shank 10 is standardized so as to render the sockets interchangeable.

It is believed that by considering the description in connection with the drawings, a clear understanding of the invention will be had. Therefore, a more lengthy description is thought to be unnecessary.

While the preferred embodiment of the invention has been shown and described, it is to be understood that minor changes coming within the field of invention claimed may be resorted to if desired.

I claim:

1. In a wrench of the class described, a body including a shank provided with a longitudinal bore extending therethrough, one end of the shank being provided with a removable socket, a plunger including a rigid stem extending through and beyond said bore, one end extending into said socket and being screw threaded, a washer carried by said screw threaded stem, a head on the opposite end of the stem, a spring disposed around said plunger and bearing at one end against the head, and at its opposite end against the adjacent portion of the shank, and a removable collar for disposition on the stem between the washer and the adjacent extremity of the shank.

2. In a wrench of the class described, a. body including a shank provided with a longitudinal bore extending therethrough, one end of the shank being provided with a removable socket, a plunger including a rigid stem extending through and beyond said bore, one end extending into said socket and being screw threaded, a washer carried by said screw threaded sten, a head on the opposite end of the stem, a spring disposed around said lunger and bearing at one end against the ead, and at its o posite end against the adjacent portion o the shank, and a horseshoe shaped block disposed around said plunger and between the washer and the adjacent portion of the shank.

In testimony whereof I affix my signature.

HERMAN W. JACOBSON. 

